\documentclass{article}
\usepackage[x11names, rgb]{xcolor}
\usepackage[utf8]{inputenc}
\usepackage{tikz}
\usetikzlibrary{snakes,arrows,shapes}
\usepackage{amsmath}
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\begin{document}
\pagestyle{empty}
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\enlargethispage{100cm}
% Start of code
% \begin{tikzpicture}[anchor=mid,>=latex',line join=bevel,]
\begin{tikzpicture}[>=latex',line join=bevel,]
  \pgfsetlinewidth{1bp}
%%
\pgfsetcolor{black}
  % Edge: 2 -- 3
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  % Edge: 0 -- 5
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  % Edge: 2 -- 6
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  % Edge: 0 -- 1
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  % Edge: 1 -- 2
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  % Edge: 2 -- 4
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  % Node: 1
\begin{scope}
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  \draw (101bp,162bp) node {OFF};
\end{scope}
  % Node: 0
\begin{scope}
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  \draw (139bp,234bp) node {OFF SV};
\end{scope}
  % Node: 3
\begin{scope}
  \pgfsetstrokecolor{black}
  \draw (27bp,18bp) ellipse (27bp and 18bp);
  \draw (27bp,18bp) node {M LAV};
\end{scope}
  % Node: 2
\begin{scope}
  \pgfsetstrokecolor{black}
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  \draw (101bp,90bp) node {CORR};
\end{scope}
  % Node: 5
\begin{scope}
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  \draw (177bp,162bp) ellipse (31bp and 18bp);
  \draw (177bp,162bp) node {SECY/R};
\end{scope}
  % Node: 4
\begin{scope}
  \pgfsetstrokecolor{black}
  \draw (101bp,18bp) ellipse (29bp and 18bp);
  \draw (101bp,18bp) node {JAN CL};
\end{scope}
  % Node: 6
\begin{scope}
  \pgfsetstrokecolor{black}
  \draw (175bp,18bp) ellipse (27bp and 18bp);
  \draw (175bp,18bp) node {TELE};
\end{scope}
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\end{tikzpicture}
% End of code

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\end{document}
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